Remove URLRequestJob::GetResponseCode implementations outside of net/.

ios/web/webui/url_data_manager_ios_backend.mm

Index: ios/web/webui/url_data_manager_ios_backend.mm
diff --git a/ios/web/webui/url_data_manager_ios_backend.mm b/ios/web/webui/url_data_manager_ios_backend.mm
index ee2c895acf9d11c4bddc350c8069bb8aead00ae5..23a10945b6268b76c25c2a8cd2a0c086c0da766a 100644
--- a/ios/web/webui/url_data_manager_ios_backend.mm
+++ b/ios/web/webui/url_data_manager_ios_backend.mm
@@ -104,7 +104,6 @@ class URLRequestChromeJob : public net::URLRequestJob {
   void Kill() override;
   int ReadRawData(net::IOBuffer* buf, int buf_size) override;
   bool GetMimeType(std::string* mime_type) const override;
-  int GetResponseCode() const override;
   void GetResponseInfo(net::HttpResponseInfo* info) override;
 
   // Used to notify that the requested data's |mime_type| is ready.
@@ -250,10 +249,6 @@ bool URLRequestChromeJob::GetMimeType(std::string* mime_type) const {
   return !mime_type_.empty();
 }
 
-int URLRequestChromeJob::GetResponseCode() const {
-  return net::HTTP_OK;
-}
-
 void URLRequestChromeJob::GetResponseInfo(net::HttpResponseInfo* info) {
   DCHECK(!info->headers.get());
   // Set the headers so that requests serviced by ChromeURLDataManagerIOS